<wfs:GetFeature
        service="WFS" version="2.0.0"
        xmlns:fes="http://www.opengis.net/fes/2.0"
        xmlns:wfs="http://www.opengis.net/wfs/2.0">
    <wfs:Query typeNames="st:Station">
        <fes:Filter>
            <fes:And>
                <fes:PropertyIsEqualTo>
                    <fes:ValueReference>
                        st:Station/st:meta/st:institutes/st:Institute/st:name
                    </fes:ValueReference>
                    <fes:Literal>ins1</fes:Literal>
                </fes:PropertyIsEqualTo>
            </fes:And>
        </fes:Filter>
    </wfs:Query>
</wfs:GetFeature>